Sam Jones, 25, had drunk nearly three bottles of whisky, beer and even poured vodka in his eye during an all-day session before collapsing in Hollins Crescent, Hebden Bridge, last September.

An inquest at Halifax heard that Mr Jones, who has a young daughter, was also found to have a fatal mix of heroin, cocaine and Temazepam in his bloodstream.

The inquest heard Mr Jones, of Calder Terrace, Mytholmroyd, had been clean from alcohol and cocaine for nine weeks before a relapse on the weekend of his death

Friend Thomas Greenwood, who was with Mr Jones in Hebden Bridge the day he died, told the inquest: "We saw him in Calder Homes Park about 2pm and he was blatantly drunk.

"He was staggering around. I gave him a lift and dropped him off outside a newsagent's in town. I never saw him again after that."

Sam was found passed out outside a house in the town centre at 9pm that night.

Resident David Brockwell, who found him, said: "At first he looked like some guy just sleeping it off.

"But after a while we became concerned."

Despite the best efforts of neighbours, paramedics who arrived at the scene pronounced Sam dead.

Coroner Roger Whittaker delivered a verdict of accidental death, saying: "He had been used to using cocaine and drinking to excess. But he had been a lot better before this tragic weekend. For some reason, he started again."

After the inquest Sam's mum, Michelle Jones, made a stark warning to other Calderdale parents about the dangers of drugs.

She said: "I want parents to be aware their children are being targeted."

Mrs Jones, whose other son, Liam, 27, has battled heroin addiction for over a decade, said: "People have ideas about drug addicts coming from broken homes and rough estates. But drugs can take hold of anyone."